trend vs trendy

trend is a noun but trendy is not a noun.

Word	Noun	Adjective	Verb	Adverb
trend	Yes	No	Yes	No
trendy	No	Yes	No	No

trend (noun)	trendy (noun)
a general tendency to change (as of opinion)
the popular taste at a given time
general line of orientation
a general direction in which something tends to move

trend (adjective)	trendy (adjective)
	in accord with the latest fad

trend (verb)	trendy (verb)
turn sharply; change direction abruptly
to be temporarily popular